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CVE-2021-47386 is a NULL pointer dereference in the Linux kernel hardware-monitoring w83791d driver. When the driver reads a device value for which bit 3 is set, bit 7 is clear, and bits 0–2 equal bits 4–6 (a 0b0xyz1xyz pattern), obsolete lm75[] state can be accessed as a NULL pointer. The obsolete field remained after w83791d subclient detection changed to managed dummy I2C-device creation. The upstream fix removes the unnecessary lm75[] field.
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Linux kernel W83791D hardware-monitor driver NULL-pointer dereference flaw.
A Linux kernel w83791d hardware-monitoring driver NULL-pointer-dereference flaw that can cause a kernel crash.
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Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
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